// ******************************************************************************
// Spine Runtimes Software License v2.5
//
// Copyright (c) 2013-2016, Esoteric Software
// All rights reserved.
//
// You are granted a perpetual, non-exclusive, non-sublicensable, and
// non-transferable license to use, install, execute, and perform the Spine
// Runtimes software and derivative works solely for personal or internal
// use. Without the written permission of Esoteric Software (see Section 2 of
// the Spine Software License Agreement), you may not (a) modify, translate,
// adapt, or develop new applications using the Spine Runtimes or otherwise
// create derivative works or improvements of the Spine Runtimes or (b) remove,
// delete, alter, or obscure any trademarks or any copyright, trademark, patent,
// or other intellectual property or proprietary rights notices on or in the
// Software, including any copy thereof. Redistributions in binary or source
// form must include this license and terms.
//
// THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE "AS IS" AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
// EVENT SHALL ESOTERIC SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, BUSINESS INTERRUPTION, OR LOSS OF
// USE, DATA, OR PROFITS) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
// IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
// ******************************************************************************

part of spine_core;

class AnimationStateData {
  final SkeletonData skeletonData;
  final Map<String, double> animationToMixTime = <String, double>{};
  double defaultMix = 0.0;

  AnimationStateData(this.skeletonData) {
    if (skeletonData == null)
      throw ArgumentError('skeletonData cannot be null.');
  }

  void setMix(String fromName, String toName, double duration) {
    final Animation from = skeletonData.findAnimation(fromName);
    if (from == null) throw StateError('Animation not found: $fromName');
    final Animation to = skeletonData.findAnimation(toName);
    if (to == null) throw StateError('Animation not found: $toName');
    setMixWith(from, to, duration);
  }

  void setMixWith(Animation from, Animation to, double duration) {
    if (from == null) throw ArgumentError('from cannot be null.');
    if (to == null) throw ArgumentError('to cannot be null.');
    final String key = from.name + '.' + to.name;
    animationToMixTime[key] = duration;
  }

  double getMix(Animation from, Animation to) {
    final String key = from.name + '.' + to.name;
    final double value = animationToMixTime[key];
    return value == null ? defaultMix : value;
  }
}
